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|
# Copyright (c) Meta Platforms, Inc. and affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from typing import Callable, Optional
import libcst as cst
from libcst import parse_expression
from libcst._nodes.tests.base import CSTNodeTest
from libcst.metadata import CodeRange
from libcst.testing.utils import data_provider
class ComparisonTest(CSTNodeTest):
@data_provider(
(
# Simple comparison statements
(
cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.LessThan(), cst.Integer("5")),),
),
"foo < 5",
),
(
cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.NotEqual(), cst.Integer("5")),),
),
"foo != 5",
),
(
cst.Comparison(
cst.Name("foo"), (cst.ComparisonTarget(cst.Is(), cst.Name("True")),)
),
"foo is True",
),
(
cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.IsNot(), cst.Name("False")),),
),
"foo is not False",
),
(
cst.Comparison(
cst.Name("foo"), (cst.ComparisonTarget(cst.In(), cst.Name("bar")),)
),
"foo in bar",
),
(
cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.NotIn(), cst.Name("bar")),),
),
"foo not in bar",
),
# Comparison with parens
(
cst.Comparison(
lpar=(cst.LeftParen(),),
left=cst.Name("foo"),
comparisons=(
cst.ComparisonTarget(
operator=cst.NotIn(), comparator=cst.Name("bar")
),
),
rpar=(cst.RightParen(),),
),
"(foo not in bar)",
),
(
cst.Comparison(
left=cst.Name(
"a", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
comparisons=(
cst.ComparisonTarget(
operator=cst.Is(
whitespace_before=cst.SimpleWhitespace(""),
whitespace_after=cst.SimpleWhitespace(""),
),
comparator=cst.Name(
"b", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
),
cst.ComparisonTarget(
operator=cst.Is(
whitespace_before=cst.SimpleWhitespace(""),
whitespace_after=cst.SimpleWhitespace(""),
),
comparator=cst.Name(
"c", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
),
),
),
"(a)is(b)is(c)",
),
# Valid expressions that look like they shouldn't parse
(
cst.Comparison(
left=cst.Integer("5"),
comparisons=(
cst.ComparisonTarget(
operator=cst.NotIn(
whitespace_before=cst.SimpleWhitespace("")
),
comparator=cst.Name("bar"),
),
),
),
"5not in bar",
),
# Validate that spacing works properly
(
cst.Comparison(
lpar=(cst.LeftParen(whitespace_after=cst.SimpleWhitespace(" ")),),
left=cst.Name("foo"),
comparisons=(
cst.ComparisonTarget(
operator=cst.NotIn(
whitespace_before=cst.SimpleWhitespace(" "),
whitespace_between=cst.SimpleWhitespace(" "),
whitespace_after=cst.SimpleWhitespace(" "),
),
comparator=cst.Name("bar"),
),
),
rpar=(cst.RightParen(whitespace_before=cst.SimpleWhitespace(" ")),),
),
"( foo not in bar )",
),
# Do some complex nodes
(
cst.Comparison(
left=cst.Name("baz"),
comparisons=(
cst.ComparisonTarget(
operator=cst.Equal(),
comparator=cst.Comparison(
lpar=(cst.LeftParen(),),
left=cst.Name("foo"),
comparisons=(
cst.ComparisonTarget(
operator=cst.NotIn(), comparator=cst.Name("bar")
),
),
rpar=(cst.RightParen(),),
),
),
),
),
"baz == (foo not in bar)",
CodeRange((1, 0), (1, 23)),
),
(
cst.Comparison(
left=cst.Name("a"),
comparisons=(
cst.ComparisonTarget(
operator=cst.GreaterThan(), comparator=cst.Name("b")
),
cst.ComparisonTarget(
operator=cst.GreaterThan(), comparator=cst.Name("c")
),
),
),
"a > b > c",
CodeRange((1, 0), (1, 9)),
),
# Is safe to use with word operators if it's leading/trailing children are
(
cst.IfExp(
body=cst.Comparison(
left=cst.Name("a"),
comparisons=(
cst.ComparisonTarget(
operator=cst.GreaterThan(),
comparator=cst.Name(
"b",
lpar=(cst.LeftParen(),),
rpar=(cst.RightParen(),),
),
),
),
),
test=cst.Comparison(
left=cst.Name(
"c", lpar=(cst.LeftParen(),), rpar=(cst.RightParen(),)
),
comparisons=(
cst.ComparisonTarget(
operator=cst.GreaterThan(), comparator=cst.Name("d")
),
),
),
orelse=cst.Name("e"),
whitespace_before_if=cst.SimpleWhitespace(""),
whitespace_after_if=cst.SimpleWhitespace(""),
),
"a > (b)if(c) > d else e",
),
# is safe to use with word operators if entirely surrounded in parenthesis
(
cst.IfExp(
body=cst.Name("a"),
test=cst.Comparison(
left=cst.Name("b"),
comparisons=(
cst.ComparisonTarget(
operator=cst.GreaterThan(), comparator=cst.Name("c")
),
),
lpar=(cst.LeftParen(),),
rpar=(cst.RightParen(),),
),
orelse=cst.Name("d"),
whitespace_after_if=cst.SimpleWhitespace(""),
whitespace_before_else=cst.SimpleWhitespace(""),
),
"a if(b > c)else d",
),
)
)
def test_valid(
self, node: cst.CSTNode, code: str, position: Optional[CodeRange] = None
) -> None:
self.validate_node(node, code, parse_expression, expected_position=position)
@data_provider(
(
(
lambda: cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.LessThan(), cst.Integer("5")),),
lpar=(cst.LeftParen(),),
),
"left paren without right paren",
),
(
lambda: cst.Comparison(
cst.Name("foo"),
(cst.ComparisonTarget(cst.LessThan(), cst.Integer("5")),),
rpar=(cst.RightParen(),),
),
"right paren without left paren",
),
(
lambda: cst.Comparison(cst.Name("foo"), ()),
"at least one ComparisonTarget",
),
(
lambda: cst.Comparison(
left=cst.Name("foo"),
comparisons=(
cst.ComparisonTarget(
operator=cst.NotIn(
whitespace_before=cst.SimpleWhitespace("")
),
comparator=cst.Name("bar"),
),
),
),
"at least one space around comparison operator",
),
(
lambda: cst.Comparison(
left=cst.Name("foo"),
comparisons=(
cst.ComparisonTarget(
operator=cst.NotIn(
whitespace_after=cst.SimpleWhitespace("")
),
comparator=cst.Name("bar"),
),
),
),
"at least one space around comparison operator",
),
# multi-target comparisons
(
lambda: cst.Comparison(
left=cst.Name("a"),
comparisons=(
cst.ComparisonTarget(
operator=cst.Is(), comparator=cst.Name("b")
),
cst.ComparisonTarget(
operator=cst.Is(whitespace_before=cst.SimpleWhitespace("")),
comparator=cst.Name("c"),
),
),
),
"at least one space around comparison operator",
),
(
lambda: cst.Comparison(
left=cst.Name("a"),
comparisons=(
cst.ComparisonTarget(
operator=cst.Is(), comparator=cst.Name("b")
),
cst.ComparisonTarget(
operator=cst.Is(whitespace_after=cst.SimpleWhitespace("")),
comparator=cst.Name("c"),
),
),
),
"at least one space around comparison operator",
),
# whitespace around the comparision itself
# a ifb > c else d
(
lambda: cst.IfExp(
body=cst.Name("a"),
test=cst.Comparison(
left=cst.Name("b"),
comparisons=(
cst.ComparisonTarget(
operator=cst.GreaterThan(), comparator=cst.Name("c")
),
),
),
orelse=cst.Name("d"),
whitespace_after_if=cst.SimpleWhitespace(""),
),
"Must have at least one space after 'if' keyword.",
),
# a if b > celse d
(
lambda: cst.IfExp(
body=cst.Name("a"),
test=cst.Comparison(
left=cst.Name("b"),
comparisons=(
cst.ComparisonTarget(
operator=cst.GreaterThan(), comparator=cst.Name("c")
),
),
),
orelse=cst.Name("d"),
whitespace_before_else=cst.SimpleWhitespace(""),
),
"Must have at least one space before 'else' keyword.",
),
)
)
def test_invalid(
self, get_node: Callable[[], cst.CSTNode], expected_re: str
) -> None:
self.assert_invalid(get_node, expected_re)
|
